Samuel e



No Model.) S. E MOWER.

ELEGTRIO MOTOR MBGHANISM. No. 433,903. Patented Aug. 5, 1890.

UNITED STATES PATENT OFFICE.

SAMUEL E. MOWER, OF NEW HAVEN, CONNECTICUT, ASSIGNOR TO HENRY e. THOMPSON & SONS, OF SAME PLACE.

ELECTRIC-MOTOR MECHANISM.

SPECIFICATI6N forming part of Letters Patent No. 433,903, dated August 5, 1890. Application filed November 9, 1889. Serial No. 329,760. (No model.)

To all whom it may concern:

Be it known that I, SAMUEL E. MOWER, of New Haven, county of New Haven, State of Connecticut, have invented an Improvement in Electric-Motor Mechanism, of which the following description, in connection with the accompanyingdrawings,is a specificatiomlike letters on the drawings representing like parts.

This invention relates to electric motor mechanism, and has for its object to construct a motor'mechanism so that thearmature of the motor may be mounted directly upon an axle or shaft, and the latter rotated at a subr 5 stantially slow speed while the said armature is revolving at a substantially high speed.

My invention is especially adapted to be employed on electric-railway cars for propel-' ling the same.

In accordance with my invention, the motor is mounted directly upon the axle of the car: truck, whereby the maximum traction effect from the weight of the. motor is obtained. The armature of the said motor is made to re- 2 5 volve on the car-axle, and is connected thereto by a speed-reducing mechanism, as will be described, so that the said armature, revolving at a high speed, produces revolution of the car-axle at a much slower speed-that is,

the said armature revolves a number of times to effect one revolution of the car-axle. The motor mechanism is preferably entirely covered and protected from external injury by a metallic shell or hood.

3 5 My invention therefore consists, in an electric-motor mechanism, of the combination, with a shaft or axle provided with wheels, of a motor having its armature mounted to run loosely on said shaft or axle, and a speed-re- 4o ducing mechanism connected to the said armature and to the shaft or axle independent of the said wheels, substantially as will be described. Other features of my invention will be 4'5 pointed out in the claims at the end of this specification.

Figure 1 is a top or plan view, partially broken out, of my improved electric-motor mechanism applied to a car axle. Fig. 2 is a 50 longitudinalsection through the motor mechanism, the car-axle being shown in elevation;

Fig. 3, a transverse section on the line 00.x, Fig. 2, only a portion ofthe teeth of the gears being shown; and Fig. 4, a transverse section of Fig. 2 on line y y, on an enlarged scale.

The axle A is provided, as herein shown, with wheels A A and it may be of any usual or well-known construction, such as now commonly employed on electric-railway cars.

The car-axle A has mounted upon it, between the Wheels A A a yoke a, anda hollow shell or drum a, which may be secured to or form part of boxes or hoods a a bolted or otherwise secured to the pole-pieces a a of an electric motor, which may be of any-6 usual or well-knownconstruction, it being herein shown as composed of substantially flat pole-pieces a a, located above and below the axle A and connected by field-magnet cores a, only one of which is shown in Fig. 0 3, which are herein represented as fastened to the said pole-pieces by bolts 0.

The sides of the field-magnets are journaled orsupported directly upon the car-axle by the yoke aand hollow shell or drum a, and the said field-magnets are supported at their ends, as herein shown, preferably by spiral springs a each of which rests upon a crossbeam or support a, secured to or forming part of the car-truck, and through which is extended a bolt a passed through an ear e of the pole-piece a, and provided above the said pole-piece with a nut a.

The car-axle A, between the yoke a and the hollow shell or drum a, has loosely mounted 8 upon it a sleeve 1), to which the armature b of the motor may be secured or form part thereof. The armature b revolves between the pole-pieces a a and may be of any usual or well-known construction. 0

The sleeve 1) atone side of the armature is provided with a commutator 19 of any usual or well-known. construction, with which cooperate suitable brushes, (not herein shown,) the said commutator being connected in any 5 usual or well-known manner with the armature. The opposite end of the sleeve 1), as herein shown, is extended through a disk or frame 19 herein shown as secured to the hood a by bolts 1), and the said disk has fastened to it, as by bolts 5 a gear-wheel b forming part of a speed-reducing device. The sleeve 1), beyond the gear '1), has secured to it by a key 11 a yoke or arm b forming bearings at the opposite ends for shafts b b provided with pinions 12 h the pinions Z) meshing with the stationary gear I), and the pinions Z9 meshing with a gear I), secured to the car-axle A by a key b. The gears b b are provided on their peripheries with'an unlike number of teethas, for instance, the gear I) may be provided with thirty-two teeth and the gear I) with thirty-four teeth, so that as the arm 12 with its shafts b 19 are revolved with the armature-sleeve b the pinion b travels around the stationary gear I) of thirtytwo teeth, while the pinions 12 run around the movable gear of thirty-four teeth, thus turning the gear 1) two teeth for each revolution of the arm b and the armature-sleeve b to which it is attached. In thismanner the speed of the armature, which may be very high, is reduced in such proportion as to produce a substantially slow-moving axle and wheel.

The hollow shell or drum a is preferably made air and dust tight and is filled with oil (I to such a depth that the pinions 11" h revolve in the oil at each revolution of the'armature sleeve, the said pinions and gears being in this manner thoroughly lubricated and protected from external injury. The drum a also serves to muffle the noise caused by the running of the pinions about the gears.

I prefer to employ two sets of pinions b b on diametrically opposite sides of the gears 12 b, as in this manner side thrust upon. the axle is obviated.

I do not desire to limit my invention to the proportion of speed between the armature and axle herein specified, as it is evident the reducing mechanism described may be'varied to produce any desired proportionate speed. 7

It will be noticed that the Weight of the armature and of the field-magnets and the other parts of the running mechanism come directly upon the axle, whereby a maximum traction effect is obtained between the wheels and the rails upon which they run.

I have herein shown my invention as applied to a car-axle; but I do not desire to limit myself to this specific use, as the motor may be applied to or used in connection with other forms of mechanism such as hoisting- Inachines, elevators, and stationary motors.

I have shown one form of speed-reducing gearing, a form capable of producing satis-.

'factory results; but I desire to be understood that Imay use any other usual or well-known forms of speed-reducing gearing without departing from my invention.

I claim- 1. In an electric-motor mechanism, the combination, with an axle provided with wheels, of a motor having its armature mounted to run loosely on said axle, and a speed-reducing mechanism connected to the said armature and to the axle independent of the said wheels, substantially as described.

2. In an electric-motor mechanism, the combination, with an axle provided with wheels, of a motor having its armature mounted loosely on said axle and having its field-magnets supported directly upon the axle, and a speed-reducing mechanism connected to said armature and to the axle independent of the said wheels and supported directly by the said axle, substantially as described.

3. In an electric-motor mechanism, the combination, with an axle, of a motor having its armature mounted to run loosely on said axle, and a speed-reducing mechanism consisting of a stationary gear I), a gear I), secured to the said axleand having a different number of teeth to those of gear I), and an arm b secured to the armature to revolve therewith, shafts b 17 carried by said arm and provided with gears I2 I), in mesh with gears I) 12, substantially as and for the purpose specified.

4. In an electric-motor mechanism,the combination, with an axle, of a motor having its armature mounted to run loosely on said axle, and a speed-reducing mechanism consisting of a stationary gear bfl a gear I), secured to the said axle and having an unequal number of teeth to those of the gear Z), and an arm b secured to the armature to revolve therewith, and gears carried by said arm and in such mesh with the gears 11 b, substantially as described. A,

5. In an electric-motor mechanism, the combination, with an axle, of a motor having its armature mounted to run loosely on said axle, and a speed-reducing mechanism consisting of a gear I), a gear 12, secured to the said axle and having a different number of teeth than those of gear I), an arm b secured to the armature to revolve therewith, gears carried by said arm in mesh with the gears b b, the hollow shell or drum a, inclosing the said reducing mechanism air and dust tight and containing a lubricant by which to lubricate said gears, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

SAMUEL E. MOWER.

Witnesses:

HENRY G. THOMPSON, L. H. DAYTON. 

